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Some Applications of Trigonometry
CH09 Question Bank
CBSE_CH09_QUESTION_BANK
Grade 10
Question:
From the top of a tower, the angle of depression of a car on the ground is $30^\circ$. The angle of elevation of the top of the tower as seen from the car is:
$30^\circ$ $60^\circ$ $90^\circ$ Cannot be determined
Step-by-Step Solution
Key Concept: Angle of elevation and angle of depression along the same line of sight are equal (alternate angles).
By the alternate-angles property, the angle of elevation from the car equals the angle of depression from the tower, which is $30^\circ$. [1.0 Mark]
Correct Answer:$30^\circ$
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